Air-compressor.



E. J. ROHRBAGHER.

AIR COMPRESSOR. APPLICATION FILED JAN. 4, 19 09.

Patented Oct. 12,1909.

WITNESSES Y ATTORNEY.

To all whom-it may comm: 4

PATENT Torr-Ion.

UNITED {STATES nnwmn .1. 3011331011, orrnnnm, wnsnmoron.

Am-oomrnnsson.

Specification of Letters Patent.

Pate ted Oct. 12, 1909;

Application filed .J'anuary 4, 1909. seen no. 470,714.

. Be it known that I, EDWARD J. R HRBAOHER,

citizen of the United States, residing at Blaine, in the-county 'of Whatcom and State of Washington, have invented certain new and useful Improvements in Air-Compressors, of which the following is a specification.

This invention relates to that class of air pumps which is designed for use in inflating es,

the tires of automobi for supplying air under pressure to operate a signal or whistle, or

, tovaiford pressure to a tank, as inmarine cient in -;operationand conveniently conto the pump piston through positivelyactin'gf work. 1

' The object of the invention is the improve1-' ment in air pumps to adapt them to theabove referred to services and to render them efiitrolled.

The 1 invention consists, essentially, inl 'a pump which is driven from the fly wheel of a motor through the medium of devices which are, upon occasion, frictionally engaged therewith and transmitted from such devices elements'embracing toothed gearing andfa 1 connecting rod which is actuated by a crank element.

The invention further consists in means for normally maintaining the pump and its operative connections in ino erative condition I together with controlling evices for convenbreakage and derangement as well as to: lessen the duty devolving upon the pump. when its services are not required and while iently causing the same to be made operative.

The invention still further. consists in "devices for controlling the outflow of air from the pump to safeguard the apparatus against the pump continues to operate. .7

The invention also consists in certain novel features of construction and or'ganizatiomas hereinafter described and claimed,=and for a 'full understanding of the invention referonce is had to the accompanying drawings, in which v Figure 1 is a view partly in vertical'section and partly in elevation of devices embodyin my invention. Fig. 2 is a-plan view thereo but omitting the discharge connections from the pump.

The reference numeral. 5 designates the 1 machine frame having intermediatelyof .1476 length a circular gear chamber 6 with a cylinally opposite sides which are arranged to be in axial alinement with, each other and perpendicular to the axis of said chamber. Integral with the frame and disposed concentrically; of the chamber axis is a trunnion 9 which. isfbored to provide a journal bearing der 7 and a shaft-bearing Supon diametricfor the shait 10 of a bevel toothed "wheel 11 positioned withinsaid chamber and in mesh with atoothed bevel-pinion 12. The latter I a shaft 13 which is jeurnaled in the bearing 8 and carries upon the outer end a pulley 14 arranged for being frictionally engaged with the periphery of a driving wheel 15, which may be the'fly-wheel of an internal combustion engine.

The gear wheel 11 is provided with a stud the power of 1s ring 23 tending to maintain the valve in 0 used condition and the nonreturn of-the discharged air to the cylinder.

For convenience in manufacture, the chamber of the cylinder-head is provided with a removable cap24 whereinto is screwed a nipple 25 to serveoas a connection with a iength of-flexible tubing, or hose, 26 which in turn .is connected at its other end by a like fnipple 27 with the casing 28 of a threenary construction ofsi'ich class and is provided with a straight passage" 30 and :1

,ed to make communication between oppositely arranged orts 32, 33' afi'orded by the valve casing, or etween the port 32 and an escape outlet 34 in the casing. In the drawing the valve is illustrated to be in the first with a cross-head pin 19 for dihead 21 which is chambered for the reception of a valve 22 which opens outwardly against is fixedly connected to or made integral with 16 which is offset from the shaft 10 to serve 'way valve 29. This valve is of the ordi: a

branch passage 31 and is accordingly adapt- 5 \Vith'in the main portion of the fitting 3.") is a check .valve opposing the backtlow of air received from the pump and may be comprised of a ball 38 which is yieldingly held by spring 39 against an annular shoulder 40 provided within the fitting 35 in proximity to the aforesaid thre way valve. At the outer extremity of the said fitting 35 is a removable apertured plug 41 to permit the flow of air therethrough and likewise thein troduction of the ball and its spring to This fitting is also within the fitting. adapted, as by the provision of a bulbshaped ou'ter form, for connection with another hose 42 for conducting compressed air to a tank, tire, or other receptacle which it is desired to supply with such a medium.

The referred to trunnion S) f the frame is fitted within an opening of a bracket member 44: which is rigidly secured, as by bolts 45, to a part, as indicated by 46, of the platform or structure which is rigidly connected with the motor from which the pump derives its actuating power.

Connected fixedly to the frame trunnion 9 0 is an arm 47 whereby the frame 5 is influenced to swing the friction pulley 14 into operative engagement with the motor wheel- 15 and in opposition to a helical spring 48 connecting said arm to a'stationaryob ect,

as, for example, to the bracket member. Mo-

tion may be given to the arm 47 to effect the aforesaid swing of the frame by any appropriate controlling devices, as through the agency of'a draw-line 49 (shown in Fig. 2)

which is'led to within convenient reach of the operator.

To operatethe pump theframe 5 is caused to swing in the direction indicated by the arrow in Fig. 2 by an exertion of force through the arm 47 to overcome the power of the spring 48. This movement of the frame carries the pulley 14: into frictional engagement with the driving wheel 15 and rotates the pulley together with'the shaft 13 and the pinion 1.2, which being in mesh with the gear 11, rotates the latter. The

. crank pin 16 is thus revolved and through the connecting rod 17 actuates the piston 18 to create a compression of atmospheric air which is alternately drawn into the cylinder through the openings 20 and discharged through the end of the cylinder into the tube 26 Where it passes through the valve 29 to the hose connection 42 to be utilized.

In taking the aforesaid course'the pressure ,of the air dislodges the non-return valves 22 and 38 but is prevented thereby from flowing in a reverse direction. The gage 37 meanwhile is affected to register the pressure discontinuing the supply either by means of the three-way valve or by the d sassociation of the of the air in the delivery passage and when .a sutficient quantity of air is delivered and has accumulated at thedesired pressure. as may be ascertained from an inspection of the gage, the valve 29 is manipulated to cause the branch passage 31 and the straight passage 30 to respectively register with the openings 32 and 34 in the valve casing whereupon the discharge from the pump is had into the atmosphere until the arm 47 is released so that the spring 48 can asser itself to separate the pulley 14; from the driver 15. This function of the invention is especially valuable as a safeguard against breakage or, at least, a resistant force which would otherwise act against the piston due to a continuance of the building up of a superfluous pressure subsequent to the obtaining of a supply of compressed air to meet the demand.

The apparatus is readily coupled in place; it occupies a relatively small space; can be conveniently attended to; and at all times is under the control of the operator as to starting, rate of operation, and facility in of compressed air frictional driving elements which actuate the pump.

What, I claim, is 1. A pump, comprising in combination with a power-wheel, a pump-casing having a piston therein, a gear-casing adjoining said pump-casing at one end, a gear mounted in one side of said gear-casing at right angles to said piston, a. crank shaft operatively connecting said gear and said piston, a shaft entering said gear-casing, and being adapted to cooperate with said power-wheel, a bevel gear mounted on said shaft and in mesh with said gear, said gear casing being. pivoted axially with said gear, and aspring actuated lever normally holding said shaft away fromsaid power-wheel.

2. A pun'ip,comprisin g in combinationwith a power-wheel, a pump-casing having a piston therein, a gear casing adjoining said pun'ip-casing at one end, a gear mounted in one side of said gear-casing at right angles tosaid piston, a crank-shaft operatively connecting said gear and said piston, a shaft entering said gear-casing, and being adapted to cotiperate with said power-wheel, a bevelgear mounted on said shaft and in meshwith said gear, said gear casing axially with said gear, upon the axis of said ed to normally hold said power-wheel.

3. A pmnp,comprising in combination with a power-wheel, a pump-casing having a piston therein, a gear casing adjoining said pump-casing at one end, a gear mounted in one side of said gear-casing at right angles and a lever liited being pivoted gear, and being adaptto said piston, a crankshaft operatively consaid gear, and being adapted to be swung meeting said gear and said piston, a shaft into and out of operative engagement with 10 entering said gear-casing, and being adaptsaid power-wheel at will.

ed to coiipei'ate with said power-Wheel, a

bevel gear mounted on said shaft and in EDWARD ROHRBACHER' mesh with said gear, said shaft; gear-casing Witnesses: and pump-easing forming a rigid structure PIERPE 351mm,

and being pivotally mounted on the axis-of 1 Lotus EBBE. 

